US5921877A - Tooth profile for roller chain sprocket - Google Patents
Tooth profile for roller chain sprocket Download PDFInfo
- Publication number
- US5921877A US5921877A US08/890,605 US89060597A US5921877A US 5921877 A US5921877 A US 5921877A US 89060597 A US89060597 A US 89060597A US 5921877 A US5921877 A US 5921877A
- Authority
- US
- United States
- Prior art keywords
- roller
- tooth
- section
- profile
- sprocket
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/06—Gearings for conveying rotary motion by endless flexible members with chains
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/02—Toothed members; Worms
- F16H55/30—Chain-wheels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/02—Toothed members; Worms
- F16H55/30—Chain-wheels
- F16H2055/306—Chain-wheels with means providing resilience or vibration damping in chain sprocket wheels
Definitions
- the present invention relates to a tooth profile for a roller chain sprocket.
- Roller chain sprockets have teeth of tooth profiles as specified in International Standards Organization (ISO) and Japanese Industrial Standards (JIS). As shown in FIG. 2, a tooth bottom 10A of a sprocket 10 conforming to the ISO and JIS standards has a profile conforming to the outline of a roller 12 of a chain 11.
- ISO International Standards Organization
- JIS Japanese Industrial Standards
- link plates 13 of the chain 11 turn about the center O of a preceding roller 12A which has previously come into engagement with a tooth of the sprocket 10 as the sprocket 10 rotates, and the roller 12 strikes against a tooth bottom 10A to generate a large noise.
- roller chain sprocket 20 as shown in FIG. 3, which is capable of reducing noise that is generated upon the engagement of the roller of a chain with a tooth of the roller chain sprocket in JP-U No. 7-6554. As shown in FIG. 3,
- the tooth flank of each of the teeth of the sprocket 20 has a first circular curved surface 20A coinciding with the moving path of the outer circumference of a roller 21 which turns about the center O of a preceding roller 21A connected to the roller 21 by link plates 22, extending from a working point T on the tooth flank where the roller 21 engages the tooth to the tip of the tooth, and a curved surface continuous with the first curved surface 20A, extending from the working point T to the root of the tooth, and formed so that the roller 21 does not come into contact therewith.
- the tooth profile of the teeth of the sprocket 20 disclosed in JP-U No. 7-6554 reduces shocks exerted on the sprocket by the roller 21 when the roller 21 engages the tooth flank of a tooth of the sprocket 20 and reduces noise generated by the engagement of the roller 21 with the tooth of the sprocket 20 because the roller 21 rolls along the first curved surface 20A into the space between the teeth until the roller 21 is held between the working points T on the tooth flanks of the adjacent teeth and does not strike against the bottom surface of the tooth.
- the tooth profile of the sprocket disclosed in JP-U No. 7-6554 is capable of reducing shocks exerted on the sprocket by the roller when the roller engages the tooth flank of a tooth of the sprocket and of reducing noise generated by the engagement of the roller with the tooth of the sprocket because the roller does not strike against the bottom surface of the tooth, the roller is unable to be disengaged smoothly from the teeth and enhances the vibration of the chain because the roller is held like a wedge between the tooth flanks converging toward the tooth bottom when the roller is in engagement with the teeth.
- the present invention provides a tooth profile for a roller chain sprocket, comprising: a first section having a circular profile, extending along a path of movement of an outer circumference of a succeeding roller of a roller chain about a center of a preceding roller of the roller chain connected to the succeeding roller by link plates, and forming a portion of a clearance flank on the back side with respect to the engaging direction of the roller chain, from a first working point on the clearance flank where the succeeding roller engages a tooth to the tip of the tooth; a second section having a circular profile continuous with the first section, conforming to the outer circumference of the succeeding roller, and forming a portion of the clearance flank from the working point to the root of the tooth; and a third section forming a portion of a working flank of a tooth on the forward side with respect to the engaging direction of the roller chain from a second working point to the tip of the tooth, continuous with the second section and formed in a profile which does not interfering with
- the roller of the roller chain is able to disengage smoothly from the working flank of the sprocket, to reduce the vibration of the roller chain resulting from the disengagement of the roller chain from the sprocket and to reduce noise caused by the vibration of the roller chain because the third section of the tooth profile forming a portion of the working flank on the forward side, extending from the second working point to the tip of the tooth and continuous with the second section having the profile conforming to the outer circumference of the roller is formed so as not to interfere with the path of movement of the outer circumference of the roller.
- FIG. 1 is a diagrammatic view of a tooth profile for a roller chain sprocket, in a preferred embodiment according to the present invention.
- FIG. 2 is a diagrammatic view of a tooth profile for a roller chain sprocket, conforming to ISO standards.
- FIG. 3 is a diagrammatic view of a previously proposed improved tooth profile for a roller chain sprocket.
- a tooth profile for a roller chain sprocket, in a preferred embodiment according to the present invention will be described with reference to the accompanying drawings.
- a portion of a sprocket 1 is shown having teeth formed in the tooth profile in a preferred embodiment according to the present invention.
- a second section 1A of the tooth profile, between a first working point T 1 on a clearance flank on the back side with respect to the direction of movement of a chain 2 and a second working point T 2 on a working flank on the forward side with respect to the direction of movement of the chain 2 has a circular profile conforming to the outer circumference of a roller 3 of the chain 2.
- a first section 1B of the tooth profile, between the first working point T 1 and the tip of the tooth, has a circular profile conforming to a path of movement of the outer circumference of a succeeding roller 3 connected by link plates 4 to a preceding roller 3A which has previously come into engagement with a working flank of the sprocket 1, having its center on the center O of the preceding roller 3A.
- the first section is a circular curved surface of a radius R having its center at the center of the preceding roller 3A.
- the value of the clearance C is determined by properly taking into consideration the dimensional accuracy of the tooth flank of the sprocket 1 and the rollers 3 of the chain 2, and the accuracy of the pitches of the rollers linked by link plates 4.
- a third section 1C of the tooth profile, between the working point T 2 on the working flank on the forward side with respect to the direction of movement of the chain 2 and the tip of the tooth has a profile which will not interfere with a circular moving path along which the outer circumference of the roller 3 turns about the center of a succeeding roller 3B when disengaging from the sprocket 1.
- the second section 1A having the circular profile, and the third section 1C between the second working point T 2 and the tip of the tooth are portions of a tooth profile specified in ISO standards.
- the first working point T 1 is on a straight line interconnecting the centers O of the two adjacent rollers 3 and 3A in perfect engagement with the circular first sections 1A of the adjacent teeth of the sprocket 1, while the second working point T 2 is nearer to the center of the sprocket 1 than the first working point T 1 because the second section 1A having the circular profile, and the third section 1C, between the second working point T 2 and the tip of the tooth, are portions of a tooth profile specified in ISO standards.
- the roller 3 moves toward the clearance flank of the tooth of the sprocket 1 along a circular path having its center at the center of the preceding roller 3A, the roller 3 is guided smoothly by the first section 1B of a circular profile extending between the tip of the tooth and the first working point T 1 and comes into engagement with the second section 1A of a circular profile. Therefore, the roller 3 does not strike hard against the clearance flank and does not generate a large noise when engaging with the tooth.
- the roller 3 moves away from the sprocket 1 along a circular path having its center at the center of the succeeding roller 3B. Since the third section 1C, extending from the second working point T 2 to the tip of the tooth is formed in the profile which will not interfere with the path of movement of the outer circumference of the roller 3, the roller 3 is able to separate easily from the second section 1A of the circular profile. Consequently, the vibration of the chain 2 will not be enhanced by the disengagement of the chain 2 from the sprocket 1.
- sections of the tooth profile in this embodiment excluding the first section 1B between the tip of the tooth and the first working point T 1 on the clearance flank on the back side with respect to the direction of movement of the chain 2, conform to ISO standards, those sections may be formed in conformity to any standards, such as JIS standards, provided that at least the second section 1A, extending between the first working point T 1 and the bottom of the tooth and continuous with the first section 1B, has a circular profile conforming to the outer circumference of the roller 3, and the third section 1C, continuous with the second section 1A and extending from the second working point T 2 and the tip of the tooth, has a profile which will not interfere with the path of movement of the outer circumference of the roller 3.
- JIS standards JIS standards
- the section of the tooth profile extending from the clearance flank on the back side with respect to the direction of movement of the chain from the tip of each tooth has a circular profile coinciding with the circular path of movement of the succeeding roller which is connected by the link plates to the preceding roller in engagement with the sprocket and is turned about the center of the preceding roller. Therefore, the succeeding roller is turned about the center of the preceding roller in engagement with the sprocket and is guided by the circular profile so as to come smoothly into engagement with the tooth, so that the roller will not strike hard against the tooth flank and will not generate a large noise.
- the roller of the roller chain is able to disengage smoothly from the working flank of the sprocket, to reduce the vibration of the roller chain resulting from the disengagement of the roller chain from the sprocket and to reduce noise caused by the vibration of the roller chain because the third section of the tooth profile forming a portion of the working flank on the forward side, extending from the second working point to the tip of the tooth and continuous with the second section having the profile conforming to the outer circumference of the roller, is formed so as not to interfere with the path of movement of the outer circumference of the roller.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gears, Cams (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Abstract
A tooth profile for a roller chain sprocket, is provided, which is capable of making the rollers of a chain come into engagement with the teeth of the roller chain sprocket without generating a large noise, and which is capable of making the rollers disengage smoothly from the teeth of the roller chain sprocket. The tooth profile has a first section between a first working point on a clearance flank on the back side with respect to the direction of a movement chain and the tip of a tooth, having a circular profile conforming to a moving path along which the outer circumference of a succeeding roller turns about the center of a preceding roller. The tooth profile has a second section between the first working point to the bottom of the tooth, which is continuous with the first section having a circular profile conforming to the outer circumference of the roller. The tooth profiles a third section between a second working point on a working flank on the forward side with respect to the moving direction of the chain and the tip of the tooth. The third section has a profile which will not interfere with a circular moving path along which the outer circumference of the roller turns about the center of a succeeding roller when disengaging from the sprocket.
Description
The present invention relates to a tooth profile for a roller chain sprocket.
Roller chain sprockets have teeth of tooth profiles as specified in International Standards Organization (ISO) and Japanese Industrial Standards (JIS). As shown in FIG. 2, a tooth bottom 10A of a sprocket 10 conforming to the ISO and JIS standards has a profile conforming to the outline of a roller 12 of a chain 11.
When a roller 12 comes into engagement with a tooth of the sprocket 10 having a tooth profile as described above, link plates 13 of the chain 11 turn about the center O of a preceding roller 12A which has previously come into engagement with a tooth of the sprocket 10 as the sprocket 10 rotates, and the roller 12 strikes against a tooth bottom 10A to generate a large noise.
The applicant of the present patent application has previously proposed a roller chain sprocket 20 as shown in FIG. 3, which is capable of reducing noise that is generated upon the engagement of the roller of a chain with a tooth of the roller chain sprocket in JP-U No. 7-6554. As shown in FIG. 3, the tooth flank of each of the teeth of the sprocket 20 has a first circular curved surface 20A coinciding with the moving path of the outer circumference of a roller 21 which turns about the center O of a preceding roller 21A connected to the roller 21 by link plates 22, extending from a working point T on the tooth flank where the roller 21 engages the tooth to the tip of the tooth, and a curved surface continuous with the first curved surface 20A, extending from the working point T to the root of the tooth, and formed so that the roller 21 does not come into contact therewith.
The tooth profile of the teeth of the sprocket 20 disclosed in JP-U No. 7-6554 reduces shocks exerted on the sprocket by the roller 21 when the roller 21 engages the tooth flank of a tooth of the sprocket 20 and reduces noise generated by the engagement of the roller 21 with the tooth of the sprocket 20 because the roller 21 rolls along the first curved surface 20A into the space between the teeth until the roller 21 is held between the working points T on the tooth flanks of the adjacent teeth and does not strike against the bottom surface of the tooth.
Although the tooth profile of the sprocket disclosed in JP-U No. 7-6554 is capable of reducing shocks exerted on the sprocket by the roller when the roller engages the tooth flank of a tooth of the sprocket and of reducing noise generated by the engagement of the roller with the tooth of the sprocket because the roller does not strike against the bottom surface of the tooth, the roller is unable to be disengaged smoothly from the teeth and enhances the vibration of the chain because the roller is held like a wedge between the tooth flanks converging toward the tooth bottom when the roller is in engagement with the teeth.
Accordingly, it is an object of the present invention to provide a tooth profile for a roller chain sprocket, capable of making the rollers of a chain come into engagement with the teeth of the roller chain sprocket without generating large noise, and making the rollers disengage smoothly from the teeth of the roller chain sprocket.
With the foregoing object in view, the present invention provides a tooth profile for a roller chain sprocket, comprising: a first section having a circular profile, extending along a path of movement of an outer circumference of a succeeding roller of a roller chain about a center of a preceding roller of the roller chain connected to the succeeding roller by link plates, and forming a portion of a clearance flank on the back side with respect to the engaging direction of the roller chain, from a first working point on the clearance flank where the succeeding roller engages a tooth to the tip of the tooth; a second section having a circular profile continuous with the first section, conforming to the outer circumference of the succeeding roller, and forming a portion of the clearance flank from the working point to the root of the tooth; and a third section forming a portion of a working flank of a tooth on the forward side with respect to the engaging direction of the roller chain from a second working point to the tip of the tooth, continuous with the second section and formed in a profile which does not interfering with a path of movement of the outer circumference of the succeeding roller.
When a succeeding roller of the chain connected by link plates to a preceding roller in engagement with a working flank of the sprocket comes into engagement with a clearance flank, the succeeding roller moves along a circular path of movement about the center of the preceding roller. The succeeding roller rolls smoothly along the first section having the circular profile to the second section having the circular profile, forming the bottom surface and conforming to the outer circumference of the roller. Since the roller moves along the circular curved surface, the roller does not strike hard against the clearance flank and does not generate a large noise when engaging with a tooth.
The roller of the roller chain is able to disengage smoothly from the working flank of the sprocket, to reduce the vibration of the roller chain resulting from the disengagement of the roller chain from the sprocket and to reduce noise caused by the vibration of the roller chain because the third section of the tooth profile forming a portion of the working flank on the forward side, extending from the second working point to the tip of the tooth and continuous with the second section having the profile conforming to the outer circumference of the roller is formed so as not to interfere with the path of movement of the outer circumference of the roller.
FIG. 1 is a diagrammatic view of a tooth profile for a roller chain sprocket, in a preferred embodiment according to the present invention.
FIG. 2 is a diagrammatic view of a tooth profile for a roller chain sprocket, conforming to ISO standards.
FIG. 3 is a diagrammatic view of a previously proposed improved tooth profile for a roller chain sprocket.
A tooth profile for a roller chain sprocket, in a preferred embodiment according to the present invention will be described with reference to the accompanying drawings. Referring to FIG. 1, a portion of a sprocket 1 is shown having teeth formed in the tooth profile in a preferred embodiment according to the present invention. A second section 1A of the tooth profile, between a first working point T1 on a clearance flank on the back side with respect to the direction of movement of a chain 2 and a second working point T2 on a working flank on the forward side with respect to the direction of movement of the chain 2, has a circular profile conforming to the outer circumference of a roller 3 of the chain 2.
A first section 1B of the tooth profile, between the first working point T1 and the tip of the tooth, has a circular profile conforming to a path of movement of the outer circumference of a succeeding roller 3 connected by link plates 4 to a preceding roller 3A which has previously come into engagement with a working flank of the sprocket 1, having its center on the center O of the preceding roller 3A.
The first section is a circular curved surface of a radius R having its center at the center of the preceding roller 3A. The relation between the radius R of the first section 1B, the chordal pitch P, i.e., the center distance between the respective centers O of the preceding roller 3A and the succeeding roller 3, the radius r of the rollers 3 and 3A, and a clearance C is expressed by the equation: R=P-r-C. The value of the clearance C is determined by properly taking into consideration the dimensional accuracy of the tooth flank of the sprocket 1 and the rollers 3 of the chain 2, and the accuracy of the pitches of the rollers linked by link plates 4.
A third section 1C of the tooth profile, between the working point T2 on the working flank on the forward side with respect to the direction of movement of the chain 2 and the tip of the tooth has a profile which will not interfere with a circular moving path along which the outer circumference of the roller 3 turns about the center of a succeeding roller 3B when disengaging from the sprocket 1. In this embodiment, the second section 1A having the circular profile, and the third section 1C between the second working point T2 and the tip of the tooth are portions of a tooth profile specified in ISO standards.
The first working point T1 is on a straight line interconnecting the centers O of the two adjacent rollers 3 and 3A in perfect engagement with the circular first sections 1A of the adjacent teeth of the sprocket 1, while the second working point T2 is nearer to the center of the sprocket 1 than the first working point T1 because the second section 1A having the circular profile, and the third section 1C, between the second working point T2 and the tip of the tooth, are portions of a tooth profile specified in ISO standards.
When the chain 2 advances toward the sprocket 1 having teeth of the above-mentioned tooth profile and the succeeding roller 3 engages the clearance flank of the tooth of the sprocket 1, the succeeding roller 3 is pulled through the link plates 4 by the preceding roller 3A which has previously engaged the working flank of the teeth of the sprocket 1 and is turned toward the clearance flank of the tooth of the sprocket 1 about the center O of the preceding roller 3A as the sprocket 1 is rotated.
The roller 3 moves toward the clearance flank of the tooth of the sprocket 1 along a circular path having its center at the center of the preceding roller 3A, the roller 3 is guided smoothly by the first section 1B of a circular profile extending between the tip of the tooth and the first working point T1 and comes into engagement with the second section 1A of a circular profile. Therefore, the roller 3 does not strike hard against the clearance flank and does not generate a large noise when engaging with the tooth.
When the chain 2 leaves the sprocket 1, the roller 3 moves away from the sprocket 1 along a circular path having its center at the center of the succeeding roller 3B. Since the third section 1C, extending from the second working point T2 to the tip of the tooth is formed in the profile which will not interfere with the path of movement of the outer circumference of the roller 3, the roller 3 is able to separate easily from the second section 1A of the circular profile. Consequently, the vibration of the chain 2 will not be enhanced by the disengagement of the chain 2 from the sprocket 1.
Although the sections of the tooth profile in this embodiment, excluding the first section 1B between the tip of the tooth and the first working point T1 on the clearance flank on the back side with respect to the direction of movement of the chain 2, conform to ISO standards, those sections may be formed in conformity to any standards, such as JIS standards, provided that at least the second section 1A, extending between the first working point T1 and the bottom of the tooth and continuous with the first section 1B, has a circular profile conforming to the outer circumference of the roller 3, and the third section 1C, continuous with the second section 1A and extending from the second working point T2 and the tip of the tooth, has a profile which will not interfere with the path of movement of the outer circumference of the roller 3.
As is apparent from the foregoing description, in the roller chain sprocket having teeth of the tooth profile of the present invention, the section of the tooth profile extending from the clearance flank on the back side with respect to the direction of movement of the chain from the tip of each tooth has a circular profile coinciding with the circular path of movement of the succeeding roller which is connected by the link plates to the preceding roller in engagement with the sprocket and is turned about the center of the preceding roller. Therefore, the succeeding roller is turned about the center of the preceding roller in engagement with the sprocket and is guided by the circular profile so as to come smoothly into engagement with the tooth, so that the roller will not strike hard against the tooth flank and will not generate a large noise.
The roller of the roller chain is able to disengage smoothly from the working flank of the sprocket, to reduce the vibration of the roller chain resulting from the disengagement of the roller chain from the sprocket and to reduce noise caused by the vibration of the roller chain because the third section of the tooth profile forming a portion of the working flank on the forward side, extending from the second working point to the tip of the tooth and continuous with the second section having the profile conforming to the outer circumference of the roller, is formed so as not to interfere with the path of movement of the outer circumference of the roller.
Claims (1)
1. A tooth profile for a roller chain sprocket, comprising:
a first section having a circular profile, extending along a path of movement of an outer circumference of a succeeding roller of a roller chain about a center of a preceding roller of said roller chain connected to said roller by link plates, and forming a portion of a working flank on a back side with respect to an engaging direction of said roller chain, from a first working point on a clearance flank where said succeeding roller engages a tooth to a tip of said tooth;
a second section having a circular profile, continuous with said first section, conforming to said outer circumference of said succeeding roller, and forming a portion of said clearance flank from said working point to a root of said tooth; and
a third section forming a portion of a working flank of a tooth on a forward side with respect to said engaging direction of said roller chain from a second working point to said tip of said tooth, continuous with said second section and formed in a profile which does not interfere with said path of movement of said outer circumference of said succeeding roller, said profile of said third section being different in shape from said circular profile of said first section.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8-179292 | 1996-07-09 | ||
JP8179292A JPH1026213A (en) | 1996-07-09 | 1996-07-09 | Sprocket tooth form for roller chain |
Publications (1)
Publication Number | Publication Date |
---|---|
US5921877A true US5921877A (en) | 1999-07-13 |
Family
ID=16063281
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/890,605 Expired - Lifetime US5921877A (en) | 1996-07-09 | 1997-07-09 | Tooth profile for roller chain sprocket |
Country Status (4)
Country | Link |
---|---|
US (1) | US5921877A (en) |
EP (1) | EP0818644B1 (en) |
JP (1) | JPH1026213A (en) |
DE (1) | DE69703468T2 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6325734B1 (en) * | 1996-12-19 | 2001-12-04 | Cloyes Gear And Products, Inc. | Random engagement roller chain sprocket with staged meshing and flank relief to provide improved noise characteristics |
EP1203902A2 (en) | 2000-11-01 | 2002-05-08 | BorgWarner Inc. | Roller chain sprocket for preventing substantially radial impact with chain rollers |
US6415532B1 (en) | 2000-07-31 | 2002-07-09 | The Toro Company | Drive sprocket for a roller chain for material removal implement |
US6761657B2 (en) | 1996-12-19 | 2004-07-13 | Cloyes Gear And Products, Inc. | Roller chain sprocket with added chordal pitch reduction |
US20040185977A1 (en) * | 1996-12-19 | 2004-09-23 | Cloyes Gear And Products, Inc. | Random engagement roller chain sprocket and timing chain system including same |
WO2007044165A1 (en) | 2005-10-14 | 2007-04-19 | Borgwarner Inc | Sprocket tooth profile for a roller or bush chain |
US20170146109A1 (en) * | 2015-07-03 | 2017-05-25 | Sram Deutschland Gmbh | Sprocket wheel for a bicycle drive |
US10703441B2 (en) | 2015-07-03 | 2020-07-07 | Sram Deutschland Gmbh | Drive arrangement for a bicycle |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7074147B2 (en) | 1998-08-25 | 2006-07-11 | Cloyes Gear And Products, Inc. | Roller chain sprocket with symmetric cushion rings |
FR2774061B1 (en) * | 1998-01-23 | 2000-03-10 | Specialites Ta | BICYCLE CHAIN DRIVE WHEEL |
CA2322652C (en) * | 1998-03-26 | 2008-07-15 | Cloyes Gear And Products, Inc. | Random engagement roller chain sprocket with staged meshing and root relief to provide improved noise characteristics |
JP3212288B2 (en) * | 1999-03-02 | 2001-09-25 | 三協オイルレス工業株式会社 | Chain drive mechanism device |
US9182027B2 (en) | 2011-12-06 | 2015-11-10 | Sram, Llc | Chainring |
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US4036071A (en) * | 1976-04-02 | 1977-07-19 | Hollis And Company | Sprocket and method for producing same |
US4099424A (en) * | 1976-06-24 | 1978-07-11 | Pemberton Robert E | Chain drive |
US4116081A (en) * | 1977-05-25 | 1978-09-26 | Caterpillar Tractor Co. | Sprocket profile |
JPH05231500A (en) * | 1992-02-24 | 1993-09-07 | Nissan Motor Co Ltd | Chain sprocket |
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JPH0454350A (en) * | 1990-06-25 | 1992-02-21 | Borg Warner Automot Kk | Low noise chain and transmitter |
FR2678890B3 (en) * | 1991-07-09 | 1993-10-15 | Bg Innovations | GEAR WHEEL FOR CHAIN TRANSMISSION, ESPECIALLY FOR A CYCLE. |
JP2546442Y2 (en) * | 1993-06-30 | 1997-09-03 | 株式会社椿本チエイン | Sprockets for roller chains |
JPH0942423A (en) * | 1995-08-01 | 1997-02-14 | Tsubakimoto Chain Co | Sprocket for high speed transmission roller chain |
ES2183141T3 (en) * | 1996-01-23 | 2003-03-16 | Cloyes Gear & Products Inc | ROLLER CHAIN DRIVING SYSTEM WITH IMPROVED NOISE CHARACTERISTICS. |
-
1996
- 1996-07-09 JP JP8179292A patent/JPH1026213A/en active Pending
-
1997
- 1997-06-11 DE DE69703468T patent/DE69703468T2/en not_active Expired - Lifetime
- 1997-06-11 EP EP97109430A patent/EP0818644B1/en not_active Expired - Lifetime
- 1997-07-09 US US08/890,605 patent/US5921877A/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2725755A (en) * | 1950-11-16 | 1955-12-06 | Morse Chain Co | Power transmission chain drive |
US4036071A (en) * | 1976-04-02 | 1977-07-19 | Hollis And Company | Sprocket and method for producing same |
US4099424A (en) * | 1976-06-24 | 1978-07-11 | Pemberton Robert E | Chain drive |
US4116081A (en) * | 1977-05-25 | 1978-09-26 | Caterpillar Tractor Co. | Sprocket profile |
JPH05231500A (en) * | 1992-02-24 | 1993-09-07 | Nissan Motor Co Ltd | Chain sprocket |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7416500B2 (en) | 1996-12-19 | 2008-08-26 | Cloyes Gear And Products, Inc. | Random engagement roller chain sprocket and timing chain system including same |
US6761657B2 (en) | 1996-12-19 | 2004-07-13 | Cloyes Gear And Products, Inc. | Roller chain sprocket with added chordal pitch reduction |
US6325734B1 (en) * | 1996-12-19 | 2001-12-04 | Cloyes Gear And Products, Inc. | Random engagement roller chain sprocket with staged meshing and flank relief to provide improved noise characteristics |
US20040185977A1 (en) * | 1996-12-19 | 2004-09-23 | Cloyes Gear And Products, Inc. | Random engagement roller chain sprocket and timing chain system including same |
US6415532B1 (en) | 2000-07-31 | 2002-07-09 | The Toro Company | Drive sprocket for a roller chain for material removal implement |
US6736744B1 (en) | 2000-11-01 | 2004-05-18 | Borgwarner, Inc. | Roller chain sprocket for preventing substantially radial impact with chain rollers |
EP1203902A2 (en) | 2000-11-01 | 2002-05-08 | BorgWarner Inc. | Roller chain sprocket for preventing substantially radial impact with chain rollers |
CN101287930B (en) * | 2005-10-14 | 2011-01-19 | 博格华纳公司 | Sprocket tooth profile for a roller or bush chain |
US20070087880A1 (en) * | 2005-10-14 | 2007-04-19 | Borgwarner Inc. | Sprocket tooth profile for a roller or bush chain |
US7740555B2 (en) | 2005-10-14 | 2010-06-22 | Borgwarner Inc. | Sprocket tooth profile for a roller or bush chain |
WO2007044165A1 (en) | 2005-10-14 | 2007-04-19 | Borgwarner Inc | Sprocket tooth profile for a roller or bush chain |
US10703441B2 (en) | 2015-07-03 | 2020-07-07 | Sram Deutschland Gmbh | Drive arrangement for a bicycle |
US10578201B2 (en) * | 2015-07-03 | 2020-03-03 | Sram Deutschland Gmbh | Sprocket wheel for a bicycle drive |
US20170146109A1 (en) * | 2015-07-03 | 2017-05-25 | Sram Deutschland Gmbh | Sprocket wheel for a bicycle drive |
US20220090671A1 (en) * | 2015-07-03 | 2022-03-24 | Sram Deutschland Gmbh | Sprocket wheel for a bicycle drive |
US11353102B2 (en) * | 2015-07-03 | 2022-06-07 | Sram Deutschland Gmbh | Sprocket wheel for a bicycle drive |
US11884363B2 (en) * | 2015-07-03 | 2024-01-30 | Sram Deutschland Gmbh | Sprocket wheel for a bicycle drive |
Also Published As
Publication number | Publication date |
---|---|
DE69703468D1 (en) | 2000-12-14 |
EP0818644A3 (en) | 1998-01-28 |
JPH1026213A (en) | 1998-01-27 |
DE69703468T2 (en) | 2001-03-15 |
EP0818644A2 (en) | 1998-01-14 |
EP0818644B1 (en) | 2000-11-08 |
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